我制作了一个简单的程序,只跟踪鼠标光标的坐标 - 它工作正常,我想做的就是用按钮开始/停止它。
到目前为止,按钮启动线程很好,我可以安全地停止线程的最佳方法是什么?这是因为我可能会在将来添加一个工具来将坐标写入文本文件。
我是否制作一个布尔值,使线程仅在它为真时运行?因为我试图编辑触发器布尔值,但它没有任何影响。
代码原样:
运行线程的类
public class tester {
static int startTime = (int) System.currentTimeMillis();
static boolean trigger = false;
static JLabel label = new JLabel();
static JLabel status = new JLabel();
static mouseLocate msl = new mouseLocate();
static JButton startButton = new JButton("Begin tracking");
static JButton stopButton = new JButton("Stop Tracker");
static Thread myThread = new Thread(new mouseLocate());
public static void main(String[] args) {
JFrame frame = new JFrame("Mouse Grabber");
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 100);
JPanel panel = new JPanel();
frame.add(panel);
panel.add(startButton);
startButton.addActionListener(new startAction());
panel.add(label);
panel.add(status);
}
static class startAction implements ActionListener {
public void actionPerformed(ActionEvent e) {
try {
if (trigger == false) {
trigger = true;
msl.setTrigger(trigger);
//label.setText("Trigger Active" + msl.isTrigger());
startButton.setText("Continue Tracking");
} else if (trigger == true) {
trigger = false;
//msl.setTrigger(trigger);
label.setText("Trigger Inactive");
startButton.setText("Stop Tracking");
}
} catch (Exception exp) {
System.out.println("EXCEPTION CAUGHT " + e);
}
//RUN
myThread.start();
}
}
鼠标定位类:
public class mouseLocate implements Runnable {
private boolean trigger = false;
private int startTime = (int) System.currentTimeMillis();
static String status = "";
public void run() {
int x, y;
while (mouseGrabber.trigger = true) {
try {
PointerInfo mouseLocation = MouseInfo.getPointerInfo();
x = mouseLocation.getLocation().x;
y = mouseLocation.getLocation().y;
System.out.println("X:" + x + " Y:" + y + " Elapsed time: "
+ (((int) System.currentTimeMillis() - startTime) / 100));
} catch (Exception e) {
System.out.println("Exception caught : " + e);
}
}
}
public int getStartTime() {
return startTime;
}
public void setStartTime(int startTime) {
this.startTime = startTime;
}
public boolean isTrigger() {
return trigger;
}
public void setTrigger(boolean trigger) {
this.trigger = trigger;
}
public static String getStatus() {
return status;
}
public static void setStatus(String status) {
mouseLocate.status = status;
}
}
感谢您的帮助,我非常感谢。
答案 0 :(得分:4)
java上没有stopThread()api了。您应该将标志设置为 volatile ,并且您的停止线程按钮只需设置标志变量值。
public volatile boolean flag;
public void run() {
while(flag) {
// Get coordinate or whatever you want
}
}
答案 1 :(得分:0)
public volatile boolean isShutingDown;
public void run() {
while(!isShutingDown) {
}
}
调用shutDown()方法,当您需要停止时
public void shutDown(){
isShutingDown = true
}